About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing for Energy Applications V
|
Presentation Title |
DED Additively Manufactured HEAs Optimized via Parametric Study of Functionally Graded Materials |
Author(s) |
Calvin M Downey, Luis Nuņez, Jakub Toman, Mohammad Abdo, Isabella J van Rooyen |
On-Site Speaker (Planned) |
Calvin M Downey |
Abstract Scope |
The nuclear industry requires advanced materials that possess mechanical strength, corrosion resistance, and irradiation resistance. High entropy alloys (HEAs) such as FeCoCrNi perform well in these categories and can present a single phase (SP) FCC structure, seen to demonstrate superior irradiation resistance compared to multi-phase and BCC structures. Past investigations of HEAs revealed significant challenges in manufacturing the SP structures with conventional casting methods. Additive manufacturing (AM) presents novel HEA fabrication technologies such as laser-engineered-net-shaping (LENS). Process control in LENS, such as laser heat input and in-situ compositional control, make this method unique to overcome issues with conventional HEA manufacturing. This study investigates LENS fabricated compositionally functionally graded materials (FGM). FGM samples are produced for compositional phase control along with parametric studies of FeCoCrNi HEA-like structures. Electron backscatter diffraction mapping, microscopy, energy dispersive x-ray spectroscopy, and microhardness tests will determine microstructure, elemental distribution, and preliminary mechanical behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Entropy Alloys, Characterization |